Manual

HP NonStop Time Synchronization User’s Guide Page 13 of 81
1. Overview
1.1. Introduction to NonStop TimeSync
NonStop TimeSync synchronizes time across multiple NonStop, Linux, and Windows
systems. It has the ability to act as a synchronization client, a synchronization server, or
both simultaneously.
In client mode, TimeSync obtains reference times from one or more configured time
sources, and adjusts the local system time accordingly. Supported time sources include
any system running TimeSync in server mode anywhere in your network, or any NTP/SNTP
server.
In server mode, TimeSync supplies reference times to requesting clients. These clients can
be other systems running TimeSync in client mode, or any NTP/SNTP client.
NonStop TimeSync supports multiple time sources, slow drift algorithms and other
detailed settings to give users precise control over how time is maintained on their
systems. It also ensures that updates occur safely on all platforms, and never allows time
to move backwards unless configured to do so.
1.2. NonStop TimeSync Features
NonStop TimeSync provides a wide range of features. In nearly all cases, these features
are equivalent on all supported platforms.
Key Features and Benefits
 Allows NonStop system clocks to be synchronized between all systems within a
cluster or Expand network.
 Allows system clocks to be synchronized between NonStop, Linux, and Windows
systems.
 Allows system clocks to be synchronized with an NTP source.
 Synchronizes clocks between systems automatically in a cluster or network; requires
no user intervention to invoke synchronization.
 Helps ensure that time updates occur safely on all platforms, and prevents time from
moving backward unless configured to do so.